Rotary pump.



E'. D. CAMPBELL.

ROTARY PUMP. APPLICATION FILED JAN. 12, 1914.

1,101,904, Patented June 30, 19141 2 SHEETS HEET 1.

FRBNK D -C6\MPBELL.

D STATES PAIENTOFFFIQE.

FRANK D. CAMPBELL, OF BLOCKHOUSE, WASHINGTON.

ROTARY PUMP.

Specification of Letters Patent.

Patented June 30, 1914.

Application filed Jenner; 12, 191.4. Serial No. 811,651.

pany ng drawings.

This invention comprehends certain new and useful improvements in pumps and has for its. primary object to provide a rotary pump in which the rotor will be arranged concentrically to the shaft and will rotate around a cam guide ring with which are engaged the plungers carriedby said rotor A further ob ect is to construct the pluners and cam guide ring in suclr'manner t at the plungers will be moved inwardly and upwardly as the rotor travels around the shaft, to allow the blades to pass the stop wall adjacent the outlet opening of the ump.

A further object is to provide a pump of this character in which the inner ends of the plungers will be provided with longitudinally extending elongated openings, where by said plungers may be properly engaged upon the shaft. j

A still further object/is to generally improve the construction and o eration of the various parts of the pumps 0 this character and increase the eiliciency thereof without materially increasing the cost of the same.

view similar to Fig. 1, partly in elevation,

with all of the plungers removed Fig. 4 is a detail elevational view, partly in section,

of the central plunger; Fig. 5 is a similar view of the other lu i ers; Fig. 6 isa like view of the other outer plunger, part of the same being broken away.

Referring more particularly to the drawing in which similar reference characters designate corresponding parts throughout the several views, 1 designates the station- The casing 1 has an outwardly offset central portion 3 within which is positioned a suitable shaft bearing 4 for one end of the rotary' shaft 5, which shaft also extends through the bearing 6 positioned in the out:

'Wardly offset central position 7 of the head 2. Fixed to the shaft 5 by the key 8 is the hub 9 of the rotor 10, which hub 9 extends into the outwardly ofiset portion 3 of the casing 1. To reduce friction. to the minimum, I have provided a plurality of bearing -balls 11 mounted in the bearing grooves 12 and 13 formed in the adjacent faces of the casing 1 and the rotor 10 respectively. The

rotor 10 is in the form of a disk having a v circular flange 14 projecting in one direction from its peripheral edge to form the outer circularportw-n of the rotor, the free circular edge of which is engaged in the" annular groove 15 formed in the inner face of the head 2.

The casing l is provided with an inlet opening 16 and an outlet opening 17 between the circular outer portion 14 of the rotor 10 and the circular outer portion of the casing 1, said inlet opening 16 and outlet opening 17 being suitably spaced from one another. A transverse stopwall 18 is formed at one side of the outlet opening 17 by forming an inwardly directed lug on the inner face of the outer circular portion of the casing 1 and providing said lug with a curved wall atv the side of the outlet opening 17 and an inclined inner wall, the purpose of which will gaged the outer ends of the plunger heads 20s I have shown threeplungers' 21 with the main portions thereof extended inwardly. and having enlarged inner ends 22 provided with longitudinally extending elongated,

slots 23, whereby said plungers may been;

gaged over the shaft5l The main ortion of the plungers 21 are offset from onean other to allow proper engagementof the en.-

larged inner ends thereof with the shaft 5 ary casing having the removable head 2.

plungers. It'w'ill therefore, be seen that the main portion of the central plunger, shown in Fig. 4 extends from the center of the inner end of the head 21 thereof, while the main portions of the outer plungers, shown in Figs. 5 and .6

are extended from the inner ends of the heads 20 thereof adjacent the outer edges thereof.

The plungers are drawn inwardly and forced outwardly by the cam guide ring 24 with which said plungers are engaged, the notches 25 being-provided in one outer face of each plunger head 20 to receive the cam guide ring 24:, it being understood that opposite walls of said notches 25 are rounded to reduce friction to the minimum and permit proper operation of the device. The cam ring 24 is provided with an inwardly ofi'set or cam portion 26 opposite the outlet opening 17 whereby each plunger will be drawn inwardly as it reaches the point opposite the outlet opening 17, whereby said plunger will avoid the stop Wall 18 but will again be gradually returned to normal posi; tion before reaching the inlet opening 16. The cam guide ring 24 is secured in position against the inner face of the head 2 by the bolts 27 engaged through said head 2 and into the ring 24:, or by other suitable means.

It is believed that from the foregoing, the complete operation of the pump will be clearly apparent and that further description is unnecessary.

It will be understood that while I-have shown the preferred embodiment of my invention, minor changes in the details of con struction and arrangement of parts may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing any of the advantages of the same.

What I claim is 1. A device of the class described comprising a stationary casing, a head for said casbig, a rotatablenshaft mounted in "said casing and head, a rotor mounted for rotation with said .shaft, a cam guide ring carried by said head, said casing having inlet and outlet openings, a stop wall adjacent said outlet opening, plungers carried by said rotor and having their inner ends mounted upon the shaft, said plungers being engaged with the cam ring whereby the former will be drawn inwardly upon each revolution of the rotor to avoid the stop wall adjacent the outlet opening. v

2. A device of the class described comprising a stationary casing and head, a rotatable shaft mounted in said casing and head, a rotor within said casing and adapted for rotation with the shaft, a cam guide ring carried by the casing and head, a plurality ,0f.

plungers having their inner ends ofiset and provided with longitudinally elongated openings, said shaft being engaged through said openings. said casing being provided with inlet and outlet openings, said cam guide ring being provided with a cam portion opposite the outlet opening, plungers being engaged with the cam guide ring whereby said plungers will be drawn inwardly as they pass the outlet opening, said rotor being provided with openings for the plungers, and a stop wall to one side of the outlet opening.

3. A device of the class described, comprising a stationary casing, a head for said casing. a shaft mounted for rotation in said casing, a rotor mounted for rotation with the shaft and provided with spaced plunger openings, a plurality of plungers engaged through said plunger openings and having their inner ends mounted for rotary and reciprocating movement upon said shaft, a cam guide ring within said rotor and fixed to the head, said casing being provided with inlet and outlet openings, said plungers being engaged with said cam guide ring, a

stop vwall to one side of the outlet opening, said cam guide ring being provided with an'inwardly ofiset cam portion opposite said outlet opening and stop wall whereby the plunger-s will be drawn inwardly as they pas? opposite said outlet opening and stop wal 4:. A device of the class described, comprising a casing, a head for said casing, a cam guide ring carried by said head, said casing having inlet and outlet openings, a shaft within said casing, a rotor within said casing and mounted for rotation with the shaft, a plurality of 'plungers having longitudinally slotted inner ends engaged around said shaft, said plungers being engaged through and adapted to rotate with the rotor, the inner ends of said plungers being offset from one another, and a stop wall adjacent the outlet opening, the heads of the plungers being provided with notches to receive the cam guide ring, whereby said plungers will be drawn inwardly upon each revolution of the rotor to avoid the stop 

